一种改进型隧道爆破模拟方法及其验证分析

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (17) : 260-267.

论文

一种改进型隧道爆破模拟方法及其验证分析

罗驰1,2，杨新安1,2，罗都颢3，张海清4

作者信息 +

An improved tunnel blast simulation method and its verification

LUO Chi1,2，YANG Xinan1,2,LUO Duhao3 ,ZHANG Haiqing4

Author information +

文章历史 +

摘要

为预测及分析隧道爆破振动对邻近结构的影响，隧道爆破的数值模拟必不可少。根据隧道爆破中多炮孔同时起爆的特点，针对爆破荷载的空间分布及爆破应力波的衰减规律两方面，分别考虑隧道爆破中多炮孔爆破荷载的叠加以及不同爆破区域应力衰减指数的差异，从而提出改进型隧道爆破模拟方法，使数值模拟尽可能与实际工程情况吻合。再对京张高铁八达岭长城站大跨过渡段第一步爆破工程进行振动监测，分析爆破振动对8号分通道隧道迎爆侧的影响，并将实测数据与改进型隧道爆破模拟方法的结果进行对比。通过该研究，介绍了一种改进型隧道爆破模拟方法并利用实测数据对其正确性进行了验证，希望能为今后隧道施工中爆破数值模拟提供一定的借鉴和指导意义。

Abstract

In order to predict and analyze effects of tunnel blast vibration on adjacent structures, numerical simulation of tunnel blast is necessary.Here, based on the tunnel blast feature of many blast holes being initiated simultaneously,aiming at spatial distribution of blast load and blast shock wave attenuation law considering multi-hole blast load superposition and differences of stress attenuation indexes in different blast areas, an improved tunnel blast simulation method was proposed to make numerical simulation as close as possible to the actual engineering situation.Vibration monitoring was conducted for the first step blast engineering of large-span transition section of Beijing-Zhangjiakou high speed railway’s Badaling Great Wall Station to analyze effects of blast vibration on blast side of the 8th branch tunnel.The measured data were compared with the simulation results using the improved tunnel blast simulation method.Through this study,it was shown that an improved tunnel blast simulation method is introduced,and its correctness is verified with actual measured data;it can provide a certain reference and guide for future blast numerical simulation of tunnel construction.

导出引用

罗驰1,2，杨新安1,2，罗都颢3，张海清4. 一种改进型隧道爆破模拟方法及其验证分析[J]. 振动与冲击, 2019, 38(17): 260-267

LUO Chi1,2，YANG Xinan1,2,LUO Duhao3,ZHANG Haiqing4. An improved tunnel blast simulation method and its verification[J]. Journal of Vibration and Shock, 2019, 38(17): 260-267

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